Merge branch '4.4' into 5.1

* 4.4:
  [Debug] fix test
  consistently use same types for strict comparisons
  [PhpUnitBridge] Skip internal classes in CoverageListenerTrait
  [VarExporter] unserialize() might throw an Exception on php 8.
  [ErrorHandler] Parse "x not found" errors correctly on php 8.
  Prevent parsing invalid octal digits as octal numbers
  remove unnecessary check for  existing request
  [DI] fix ContainerBuilder on PHP8
  [Console] Make sure $maxAttempts is an int or null.
  [VarDumper] Fix caster for invalid SplFileInfo objects on php 8.
  [Intl] Skip test cases that produce a TypeError on php 8.
  [PhpUnitBridge] Adjust output parsing for PHPUnit 9.3.
  [PhpUnitBridge] CoverageListenerTrait update for PHPUnit 8.5/9.x
  add bosnian (bs) translation
  [Debug] Parse "x not found" errors correctly on php 8.

Author: nicolas-grekas